diff --git a/lib/bindings/http/receiver_structured_0_2.js b/lib/bindings/http/receiver_structured_0_2.js
index b61d793..e5cacd3 100644
--- a/lib/bindings/http/receiver_structured_0_2.js
+++ b/lib/bindings/http/receiver_structured_0_2.js
@@ -7,9 +7,9 @@ var JSONParser = require("../../formats/json/parser.js");
 
 const jsonParserSpec02 = new JSONParser(new Spec02());
 
-const parsers = {};
-parsers[Constants.MIME_JSON]    = jsonParserSpec02;
-parsers[Constants.MIME_CE_JSON] = jsonParserSpec02;
+const parser_by_mime = {};
+parser_by_mime[Constants.MIME_JSON]    = jsonParserSpec02;
+parser_by_mime[Constants.MIME_CE_JSON] = jsonParserSpec02;
 
 const allowed_content_types = [];
 allowed_content_types.push(Constants.MIME_CE_JSON);
@@ -54,8 +54,9 @@ Receiver.prototype.parse = function(payload, headers) {
   var sanity_headers = Commons.sanity_and_clone(headers);
 
   var contentType = sanity_headers[Constants.HEADER_CONTENT_TYPE];
+
+  var parser = parser_by_mime[contentType];
   
-  var parser = parsers[contentType];
   var cloudevent = parser.parse(payload);
 
   return cloudevent;